Buddleia
Buddlejaceae - Buddleja davidii
BioSecurity

What does it look like?

Buddleia is a woody and deciduous ornamental shrub that grows up to 3m tall. The small mauve/purple flowers are orange inside and form distinctive cone-shaped hanging clusters between December and February, followed by seed capsules 5-10mm long.

The plant invades river beds/streamsides, disturbed areas, shrubland and forest margins.  It tolerates a wide range of soils and temperatures, prefers wet to moderately dry conditions, and is resistant to wind and damage. It can grow in shade or open areas, but seedlings require high light levels.

Why is it a problem?

Buddleia establishes and grows quickly, forming dense thickets in a wide range of habitats, excluding other plants. It reproduces vegetatively through regeneration from suckers, as well as producing vast numbers of highly viable seeds, which complete with native varieties.

Control Methods

Physical control

  • Hand pull or dig out small plants and leave on site to rot down.

Herbicide control

  • Cut stumps and apply glyphosate (250ml/L) or Tordon Brushkiller (250ml/L).
  • Spray February-April with glyphosate (10ml/L) or metsulfuron-methyl 600g/kg (5g/10L) or Tordon Brushkiller (90ml/15L knapsack or 250ml/100L spraygun).
  • Young plants can be sprayed late summer to autumn with 10ml/L glyphosate or 5g/10L metsulfuron-methyl.

 

More Information

Buddleia is a Community Pest Control species. Contact the Northland Regional Council if you would like to know more about this. 

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